Live working device for cable bypass

The utility model discloses a live working device for a cable bypass. The live working device comprises bypass rod-climbing cables correspondingly connected with transmission lines at two ends of a to-be-examined line segment, a bypass main cable connecting the bypass rod-climbing cables at two ends, and bypass load switches connecting the bypass rod-climbing cables and the bypass main cable, wherein the bypass main cable is an engineering cable. The live working device for a cable bypass has good through-current capability, the engineering cable at the construction site can be used, normal power supply is not influenced, the use is simple and convenient, and the cost is low.